2001 Chevy Impala Heater is screwy

Please bear with me because I do not know all the Car lingo so I'll do my best. When I first got my car the heater was really loud when it was on and only number two through four would work on the dial. So I had the dial connector on the inside of the dashboard replaced and I could use the heat on one through five on the dial. After I fixed that sometimes the heat blower would just shut off and couple minutes later it would come back on. Well last week it went off and never came back on and it smelled like it was burning a crayon even though there were no crayons near where the smell was coming from. So I had the heater/blower replaced it's a one piece of equipment. It worked for about 48 hours and now the heat will shut off while I'm driving and if I shut it off it will come back on. But earlier today it did not come back on it shut off and I was driving when it decided to come back on. So I need some help please if someone can tell me why my heat goes on and off please it's driving me crazy. Thank you.

I am working on this impala 2001 and it seams that it will not start first stated for one day only over nite something happen but next day it wont star again,replace cam sensor,crank sensor,computer,i...

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.